I leave the empty basket in front of the machine, which for me happens to be somewhere where I'll pass by frequently until I need to take it out. That keeps it 'in sight, in mind'. Heck you could even put it in the kitchen to remind you.

I don't like the extra complexity that often comes with digital solutions, but I do like having a system. The simpler and less thought required, the better.

I do this for a number of different things. Rather than put it on a list I put it somewhere where it's in the way.